package com.sowevo.bjjnts.utils;

import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.sowevo.bjjnts.config.Config;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


@Component
@Slf4j
public class OCRUtils {
    private static String BAIDU_ACCESS_TOKEN;
    public static final String BAIDU_OCR_URL = "https://aip.baidubce.com/rest/2.0/ocr/v1/accurate_basic";
    public static String TR_OCR_URL;
    public static String OCR_TYPE;


    public OCRUtils(Config config) {
        OCRUtils.BAIDU_ACCESS_TOKEN = config.getAccessToken();
        OCRUtils.TR_OCR_URL = config.getTrWebOCRUrl();
        OCRUtils.OCR_TYPE = config.getOcrType();
    }

    public static String doOcr(String src) {
        if (OCR_TYPE.equals("baidu")){
            return doBaiDuOcr(src);
        } else if(OCR_TYPE.equals("tr")){
            return doTrOcr(src);
        } else {
            log.info("未知的OCR类型!");
            throw new RuntimeException();
        }
    }

    /**
     * 使用TrWebOCR识别
     *
     * @param src src
     * @return {@link String}
     */
    public static String doTrOcr(String src) {
        if (StrUtil.isBlank(TR_OCR_URL)){
            log.info("木有TrOcrUrl,不能识别验证码,再见!");
            throw new RuntimeException();
        }
        src = src.replace("data:image/png;base64,","");
        // 请求url
        Map<String, Object> paramMap = new HashMap<>();
        paramMap.put("img",src);
        String result = HttpUtil.post(TR_OCR_URL, paramMap);
        JSONObject jsonObject = JSONUtil.parseObj(result);
        String code = String.valueOf(jsonObject.getByPath("data.raw_out[0][1]"));
        if (code!=null){
            code = code.replaceAll("\\|","1");
            code = code.replaceAll("十","+");
            code = code.replaceAll("I","1");
            code = code.replaceAll("l","1");
            code = code.replaceAll("÷","+");
            code = code.replaceAll("·","-");
            code = code.replaceAll("\\.","-");
            code = code.replaceAll(" ","");
            code = code.replaceAll("①","0");
        }
        return code;
    }

    /**
     * 使用百度光学字符识别代码
     *
     * @param src src
     * @return {@link String}
     */
    public static String doBaiDuOcr(String src) {
        if (StrUtil.isBlank(BAIDU_ACCESS_TOKEN)){
            log.info("木有accessToken,不能识别验证码,再见!");
            throw new RuntimeException();
        }
        String auth = getAuth();
        // 请求url
        Map<String, Object> paramMap = new HashMap<>();
        paramMap.put("image",src);
        paramMap.put("access_token",auth);
        String result = HttpUtil.post(BAIDU_OCR_URL, paramMap);
        JSONObject jsonObject = JSONUtil.parseObj(result);
        return String.valueOf(jsonObject.getByPath("words_result[0].words"));
    }

    public static String getAuth() {
        // 官网获取的 API Key 更新为你注册的
        String clientId = "";
        // 官网获取的 Secret Key 更新为你注册的
        String clientSecret = " ";
        return getAuth(clientId, clientSecret);
    }
    /**
     * 获取API访问token
     * 该token有一定的有效期，需要自行管理，当失效时需重新获取.
     * @param ak - 百度云官网获取的 API Key
     * @param sk - 百度云官网获取的 Securet Key
     * @return assess_token 示例：
     * "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567"
     */
    public static String getAuth(String ak, String sk) {
        // 获取token地址
        String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
        String getAccessTokenUrl = authHost
                // 1. grant_type为固定参数
                + "grant_type=client_credentials"
                // 2. 官网获取的 API Key
                + "&client_id=" + ak
                // 3. 官网获取的 Secret Key
                + "&client_secret=" + sk;
        try {
            URL realUrl = new URL(getAccessTokenUrl);
            // 打开和URL之间的连接
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.err.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String result = "";
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            /**
             * 返回结果示例
             */
            System.err.println("result:" + result);
            JSONObject jsonObject = new JSONObject(result);
            String access_token = jsonObject.get("access_token").toString();
            return access_token;
        } catch (Exception e) {
            System.err.printf("获取token失败！");
            e.printStackTrace(System.err);
        }
        return null;
    }
}